That's too bad. Learning can be a painful and expensive process. In my experience if its been badly heat stressed into the flower stage it may be very difficult to recover. It needs to push out more budding sites but since its in flower it can't do that. If you put it back in veg and then re-flower its going to be double stressed and you could easily wind up with a hermaphrodite.
Now this is just me... old farm hand here... if you have decent soil with proper drainage that hasn't been used to grow several times you hardly need any nutes. Again, just my opinion I know many min/maxers will jump on my back about it. But a plant knows what it needs and so long as the soil is rich and fertile (like potting soil) and loamy for drainage I wouldn't use too many nutes. A little mild solution once every couple of weeks in the veg stage and maybe once in the flower stage with bloom booster. But I think people do more damage with supplemental nutes than they do good. Spend a little time amending your soil with bat guano or cow manure and it'll be fine.
Hope your grow recovers. I'd definitely address the possibility of that glass burning your plant, especially if the leaves are actually touching it during the hottest, most direct part of the sunshine. I have indoor plants around my french doors and if their leaves touch the glass they often yellow and burn. Magnifying effect